In Naruto, having the Reincarnation Eye means that this person has the six powers of the Six Immortals, and in the anime, in addition to the Six Immortals, there are several people who have also used the Power of the Six Paths, of which Nagato is such a being, and Nagato is also the user of the Reincarnation Eye, and the one who is most skilled and most frequent in the use of the Six Paths Ninjutsu.
However, when fighting with The Yamato Hanzo, Nagato lost the mobility of his feet, so Nagato could only rely on the six Penns to help him move, and the six Penns also had one of the six ninjutsu, but there was also a kind of ability that the Six Penns did not have, this ability could only be used by Nagato himself, and this ability was the power of the outer path.
The power of the outer path is a relatively special power in the power of the six ways, and the art of reincarnation is a special ability that can bring people back to life, and in the anime, this ability was originally prepared for himself by Uchiha Ban, but he did not expect that in the battle where Payne attacked Kiba, Nagato used this ability on the kiba villagers, and he himself died of exhaustion.
Many people say that after using the Outer Path Reincarnation Innate Technique, the caster's end is only death, but this is not the case, in the Ninja War, the Belt Earth also performed the Outer Path Reincarnation Heavenly Magic under the control of the Black Jedi, but the Belt Earth did not die directly, so it seems that Nagato's death was completely caused by his own chakra exhaustion.
But the question is, since Nagato has the power of the Outer Way, why can't the Six Paths Payne use the power of the Outer Way? There are also six Payne's abilities are all different, but they are also Nagato's puppets, under Nagato's control, why doesn't Nagato let each of them have the same abilities as himself? Isn't that stronger in battle?
First of all, before Nagato controlled the Six Penns, when he made the Six Penns, he made and transformed them by manipulating the power of the Hell Way, so nagato did not intend to make them all have the same abilities as himself when he made the Six Penns, and if he did so, the Six Penns would also be confused in their coordination.
Each of the six Paynes has different abilities, so nagato will be more convenient when controlling these Paynes, and when which Payne will use what abilities, these are more methodical, but if the abilities are the same, there will be chaos when manipulating, so it is better to make a difference in their abilities.
Then there is the power of the outer path, since it is the power of the outer path, then this ability should be outside the six paths, and then there is a point that if the six penns have this ability, there is no chance to use it, after all, this ninjutsu is not a killer's trick, but is used to save people, so for Nagato, this ability is completely useless even if it is given to the six penns.
So for the power of the outer path, Nagato still chose to stay on his body, and Nagato also resurrected everyone in Kiba Village through this power, but if the only regret of this ninjutsu should be that he was not able to resurrect himself, but the question also came, if Nagato resurrected Yahiko, would these things happen later?
In your opinion, why didn't Nagato resurrect Yahiko in the first place?